One takes a risk by holding the door open for people who are entering or exiting a crowded establishment. Sometimes, you innocently hold the door open for a few people, but those folks are immediately followed by more and more people. And the line of people never ends. After the sixth or seventh person passes by, are you still expected to keep holding the door open? I mean, I have a life, too. How long am I expected to stand here with the door open? The hope is that an appreciative person in the moving-line-out-the-door will take the baton and assume the mantle of “standing there holding the door open.”

Source:  Huffington Post